Lock for sliding doors.



A. H. RIGHARDSK: R. G. KITTINGER.

I LOOK r011 SLIDING noons. APPLICATION FILED APR. 29, 1908.

906,289. a v Patented Dec.8,190 8.

2 SHEETS-SHEET 1.

A. H. RICHARDS & 'R. O. KITTINGBR.

LOOK FOR SLIDING DOORS. APPL-IOATION FILED APR. 29, 190B.

Patented Dec. 8, 1908.

' 2 SHEETS-SHEET 2.

ifizrzesses: a a. Um"

nnrrnn s'rn'i ns PATENT OFFICE.

ALFRED H. RICHARDS AND ROSGOE G. KITTINGER, OF BUFFALO, NEW YORK.

LOOK FOR SLIDING noons.

Specificationof Letters Patent.

Patented Dec. 8, 1908.

Application filed April 29, 1908. Serial No. 429,838.

To all whom it may concern:

Be it known that we, ALFRED H. Rronnnos and Rosoon C. KITTINGER,citizens of the United States, residing at Buffalo, in the county ofErie and State of New York, have invented a new and useful Improvementin Looks for Sliding Doors, of which the following is a specification.

This invention relates more particularly to improvements in permutationlocks for use upon railway car doors and other sliding doors, althoughthey are of course adaptable to various other uses.

One object of the invention is to provide a lock of this kind which willbe exceedingly simple in construction and positive in operation and inwhich the various parts are so constructed and arranged that they cannotbe broken or displaced by thejar of the car or by any force applied inendeavoring to break open the door, when locked.

Further objects of the invention are to so arrange the bolt whichsecures the door and connect it to the locking means therefor that thelatter cannot be broken or injured by any force applied to the door orthe bolt in an endeavor to open the door; and also to construct a lockwhich can be readily secured upon car doors of ordinary construction andwhich when so secured, will present no ac cessible openings on the outerside of the car, in which tools or explosives can be inserted fortampering with or destroying the look.

In the accompanying drawings: Figure 1 is a fragmentary side elevationof the outer side of a car and its door provided with a lock embodyingthe invention. Fig. 2 is a sectional plan thereof on line 22-, Fig. 1,showing the bolt in its locking position. Fig. 3 is a sectionalelevation thereof on line 3-3, Fig. 2. Fig. 4 is an elevation, partly insection, of the lock viewed from the inside of the car. Fig. 5 is asectional elevation of the same on line 55, Fig. 4. Fig. 6 is asectional elevation thereof on line 66, Fig. 4. Fig. 7 is a sectionalelevation on line 77, Fig. 4.

Like reference characters refer to like parts in the several figures.

A represents a portion of one of the side walls of a car, B the slidingdoor, and C the door post or jamb, all of which parts are of well knownconstruction.

D represents a metal plate which is secured on the inner face of theside wall A of the car adjacent to the door post C and is provided atits forward end with a bearing block cl which is preferably formedintegrally therewith and extends forwardly beyond the body portion ofthe plate into an opening or recess in the door post C. A second bearingblock E projects outwardly from the plate D some distance in the rear ofthe block 01 and these two blocks form bearings for a locking bolt Fwhich is journaled therein, the block E being provided with alongitudinal hole 6 through which the bolt F extends, while the block (Zhas a semicircular groove or seat for the bolt F and a removal cap platewhich holds the bolt in the seat. Suitable bolts (2? are employed forsecuring the block and its cover plate firmly in place in the door post0.

The bolt F is provided with annular shoulders f which engage theopposite sides of the bearing block (Z and hold the bolt firmly againstendwise movement while at the same time permitting free rotary movementthereof, and at its forward end in advance of the bearing block the boltF terminates in an elongated T-shaped locking head f.

A keeper G is bolted or otherwise suitably secured on the inner face ofthe door B opposite to the bolt F and has at its forward end a lug 9provided with an elongated slot or opening 9 to receive the bolt head.When the door is closed. the head of the bolt enters the slot g, andbyturning the bolt a quarter revolution, the head interlocks with thekeeper lug and locks the door.

Any suitable means may be employed for thus turning the bolt F tointerlock its head with the keeper and for releasing it therefrom. Inthe construction shown, a push rod Hpasses through a guide hole in thelock plate D and is pivotally connected at its inner end by a link itwith 2. lug h on the bolt F. This rod extends through the side wall ofthe car and is provided with a suitable knob h at its outer end, byoperating which the bolt F can be turned into and out of its lockingposition. In the locked position of the bolt, the knob k preferablyrests snugly against the outer face of the car wall and toturn the boltfor releasing the same, the knob is drawn outwardly to the extendedposition-shown in dotted lines in Fig. 5.

For locking the bolt F against rotary movement when its head f is ininterlocking engagement with the keeper G, a looking bar I is providedwhich is mounted in a vertical opening 11 in the bearing block E and iscapable of being raised and lowered therein. The vertical opening 2'intersects the longitudinal bolt opening e in the bearing block E at oneside thereof, and the bolt F is provided with a groove or segmentalopening 2" in one side thereof, so arranged that when the bolt is in itslocking position this groove will register with the vertical opening 2'and permit the locking bar I to move freely up and down past the bolt.In this position of the bolt the locking bar, when raised, will engagein the groove 2" and holdthe bolt from turning. hen the locking bar hasbeen lowered out of engagement with the groove i, the bolt is free toturn to its released or unlocked position.

The locking bar I is suitably secured at its lower end to an operatinglever K. This lever is pivoted at one end to the lock plate D and at theother end beyond its point of connection with the locking bar I it isprovided with a reduced end portion or tongue is which is adapted to beengaged by the tumblers Z of a permutation lock L for raising andlowering the same to move the locking bar I into and out of lockingengagement with the bolt F.

The permutation lock L, Figs. 5-7, may be of any usual or suitableconstruction. As shown in the drawings, it consists of a series oftumblers Z mounted on a post Z of the V lock plate D and adapted to beoperated in the usual manner by a shaft Z journaled in said post andextending to the front or outer side of the car where it is providedwith a dial and operating knob Z of suitable construction. The tumblersare provided with segmental notches or pockets Z in their edges which,when the operating knob Z has been turned to move the tumblers inaccordance with a predetermined combination, will register with oneanother and in this position the tongue 70 of the operating lever Kengages in the notches. The operating knob Z of the lock L can then befurther turned to raise and lower the operating lever K and thus movethe locking bar I into and out of engagement with the bolt F.

When the tumblers are turned to withdraw the locking bar from engagementwith the bolt, the operating lever K will be moved downwardly to theposition shown in dotted lines in Fig. 4, in which position it engages astop an on the lock plate D which limits its movement. In this positionthe tongue 0 remains in engagement with the pockets Z in the tumblers Zand cannot be withdrawn therefrom and further movement of the tumblersin this direction is pre vented. It is thus impossible to move thetumblers so as to lock the operating lever against movement when it isin its lowered position with its locking bar withdrawn from engagementwith the bolt, and the ment of the lock will release the tongue is fromengagement with the pockets Z* of the tumblers and the tongue will thenride upon the unbroken edges of the tumblers and be supported and heldin its raised position thereby. If desired a casing can be secured onthe lock-plate to inclose and protect the locking mechanism.

It will be seen from the foregoing description that all cndwise strainon the bolt F is borne by the shoulders f in engagement with the bearingblock d and that no part of this strain is received by the locking bar Ior the lever and permutation lock which operate the same. The 7operating mechanism for locking the bolt will therefore not be ali'ectedby any attempt which may be made to force the door or lock, and alldisplacement and injury of its parts is prevented.

The construction of the push rod H is such that if force is applied tothis rod in attempting to turn the bolt when locked, without releasingthelocking bar from engagement therewith, this rod will give way beforeany injury will be done to the locking bar and its operating mechanism.

The lock can be readily applied to cars of ordinary construction andforms an effective means for preventing the cars from being broken intoand their contents stolen. All of the principal parts of the lock arefirmly mounted on the lock plate and it has no springs or delicatemechanism which can easily become broken and disarranged.

e claim as our invention:

1. The combination of a keeper, abolt provided with a head adapted to beinterlocked with said keeper by turning the bolt, a bearing in which thebolt is held from endwise movement and is adapted to be turned, meansfor turning said bolt to move said head into and out of interlockingengagement with said keeper, a sliding locking bar which is slid intoengagement with said bolt for holding the same against turning, andmeans for locking said bar in engagement with said bolt, substantiallyas set forth.

2. The combination of a keeper, aboltprovided with a head adapted to beinterlocked with said keeper by turning the bolt, a bearing in which thebolt is held from endwise movement and is adapted to be turned, meansfor turning said bolt to move said head into and out of interlockingengagement with said keeper, a sliding locking bar which is slid intoengagement with said bolt for holding the same against turning, andmeans for moving said bar into and out of engagement with said bolt andfor locking the same in forth.

3. The combination of a keeper, abolt provided with a head adapted to beinterlocked with said keeper by turning the bolt, a hearing in which thebolt is held from endwise movement and is adapted to be turned, meansforturning said bolt to move said head into and out of interlockingengagement with said keeper, a locking bar which is movable transverselyof said bolt into and out of engagement therewith, and means for lockingsaid bar in engagement with said bolt for holding the same againstturning, substantially as set forth.

a. The combination of a keeper, a bolt provided with a head adapted tobe interlocked with said keeper by turning the bolt, means for turningsaid bolt to move said head into and out of interlocking engagement withsaid keeper, a bearing in which said bolt is adapted to turn, a lockingbar which is movable transversely of said bolt in said bearing into andout of engagement With said bolt,

means for locking said bar in engagement with said bolt, and means forholding said bolt against endwise movement, substantially as set forth.

5. The combination of a keeper, a bolt provided with a head adapted tobe interlocked with said keeper by turning the bolt, means for turningsaid bolt to move said head into and out of interlocking engagement withsaid keeper, a bearing having an opening in which said bolt is journaledand a transverse opening which intersects the same, a locking bar whichis movable in said transverse opening into and out of engagement withsaid bolt, means for moving said bar, means for locking the same inengagement with said bolt, and means for holding said bolt againstendwise movement, substantially as set forth.

6. The combination of a keeper, abolt provided with a head adapted to beinterlocked with said keeper by turning the bolt, a bearing in which thebolt is held from endwise movement and adapted to turn, means forturning said bolt to move said head into and out of interlockingengagement with said keeper, a sliding locking bar which is slid intoengagement with said bolt for holding the same against turning, and apermutation lock adapted to engage said bar and move the same into andout of engagement with said bolt and lock the same in engagement,therewith, substantially as set forth.

WVitness our hands in the presence of two subscribing witnesses.

ALFRED H. RICHARDS. ROSCOE O. KITTINGER. Vvitnesses C. B. HoRNBEoK, E.C. HARD.

